Hot-blast stove.



{I No. 728,185. PATENTED MAY 12, 1903.

- J. KENNEDY.

HOT BLAST STOVE. APPLICATION FILED MAR. 10, 1903. .NO MODEL.

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PATENTED MAY 12, 1903.

J. KENNEDY.

HOT BLAST STOVE;

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Patented May 12, 1903.

OFFICE.

JULIAN KENNEDY, OF PITTSBURG, PENNSYLVANIA.

HOT -B'LAJST STOVE.

SPECIFICATION forming part of Letters Patent No. 728,185, dated May 12, 1903.

Application filed March 10, 1903. I

To aZZ whom it may concern: 1

Be it known that I, JULIAN KENNEDY, of Pittsburg, Allegheny county, Pennsylvania, have invented a new and useful Hot-Blast Stove, of which the following is a full, clear,

and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 isa vertical section of my improvedstove with the central part broken away. Fig. 2 is a partial vertical section on the line II II of Fig. 1. Fig. 3 is a horizontal crosssection on the lineIII III of Fig. 2;

the lines IV IV, V V, and VI VI, respectively, of Fig. 1, showing the arrangement of the checker-work.

My invention relates to the class of hotblast stoves, and is designed to improve the distribution of the gases and make the tem perature uniform in its different portions. It is also designed to provide an improved arrangement of the chimney-valve and coldblast inlet, whereby the fines may be easily cleaned out, and also toprovide a cheap, simple, and efficient construction.

In the drawings I show a two-pass stove with the outer annular wall 2 and the inner concentric wall 3, which is preferablya double wall, as shown, and which incloses the combustion-chamber 4. The brick foundation 5 is provided with an annularflue 6, which extends around a transverse arch 7, the flue 8 extending under the arch and connecting its opposite portions. The chimney-outlet 9 and the cold-blast inlet 10 are located on opposite sides in register with the ends of the crossflue 8. .By thus locating these flues opposite to each other a blast can be driven through to clean out the dust and accumulation which settles to the bottom of the stove. Into this flue also open three cleaning-ports 11, 12, and 13, closed by suitable doors 14., and an airrelief flue 15 also opens into the flue 6, these fiues being shown in Fig. 2.

A hot-blast port 16 leads into the lower end of the combustion-chamber and over the flue 6, it preferably being arranged at an upward incline, as shown, and having the usual hotblast valve 17. The gas-burner port 18 is opposite to the hot-blast port at the lower end of the combustion-chamber. and at an opposite incline thereto.

and Figs. shown in Fig.

4, 5, and 6 are partial horizontal sections on shown in Fig. .tion is supported on radial arches 21, (shown Serial Nc. 147,107. (No model.)

is arranged -The flue 6 is open upwardly to the checkerwork in the annular space around the combustiomchamber except where it iscovered bytheflues 16 and 18.

The. checker-work is arranged in radial interlock'ed form, 19 being the radial bricks, and 20 the bricks arranged in concentric circular rows between and interlocking with them. The bricks 20 at one level abut against the radial bricks, which are continuous, as 6-, while atthe next level the bricks 20 are continuous and the radial bricks 19 abut against them and cover the joints, as

5. This checker-work formain Figs. 1 and 4,) these arches being supported upon-ledges at the lower portions of the outer wall 2 and the outer portion ofthe inner wall 3.

In the operation of the stove when it is being heated the products ofcombustion from the gas-burner rise through the'combusti'onchamber and thence descend through the checker-work into the annular flue 6, whence they pass out through the chimney-flue. When the gas-burner and chimney-fluegare closed and the cold-blast'inlet and hot-blast outlet are open, the ai'renterin'g. port 10 flows around the flue 6 and'through the flue 8, and is thus evenly distributed. This air rises through the checker-work in substantially equal amounts in the'dilferent parts and then passes down through the central flue and out through the hot-blastfvalve.

The advantages of myinvention result from the even distribution of the gases while heating and the air passing in the opposite direction, resulting from the peculiar arrangementof the flues in connection with theradial checker-work. 'The oppositely-located chimney-portvand cold-blast inlet provide for a simple and effective cleaning of the stove.

The invention may be applied to a three or four pass stove, and many other variations may be made in the form and arrangement of the parts without departing from my invention.

I claim- 1. A hot-blast stove having a lower annular flue with a central arch containing a crossflue connecting the opposite sides of the annular flue, a central combustion-chamber with its lower end over the arch, a gaseous inlet and hot-blast outlet leading into the lower end of the combustion-chamber, radial checker-work around the combustion-chamber and opening downwardly into the annular flue, said flue having a chimney-outlet and a cold-blast inlet leading into it; substantially as described.

2. A hot-blast stove having an annular flue in its base with a cross-flue connecting its opposite sides, and oppositely-located chimney and cold-blast ports opposite to the ends of the cross-flue; substantially as described.

3. A hot-blast stove having a lower central arch with a cross-flue extending under it and opening into an annular flue, a central combustion -chamber above the arch, annular checker-work surrounding the combustionchamber and opening downwardly into the annular flue, and a chimney-port and coldblast port opening into the annular flue on opposite sides substantially in registry with the ends of the cross-flue under the arch; substantially as described.

In testimony whereof my hand.

I have hereunto set JULIAN KENNEDY. Witnesses:

GEO. B. BLEMING, H. M. CORWIN. 

